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3 years ago

Analyze the following chemical combinationsa) MgOb)CaCl2c) Na2O

Chemistry

1 answer:

Rashid [163]3 years ago

8 0

The answer is B for sure

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1. Antarctica is a frozen land, so cold and icy that no trees can grow there. Yet scientists have discovered fossils(remains pre

algol [13]

Answer:

This means that Antarctica once had a warmer climate.

Explanation:

Trees usually grow in warm climates, and Antarctica has little to no plant life.

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2 years ago

Find the mass of an object on earth if its weight is 100N

Kaylis [27]

Answer:

0.19 kg

8 N

1.964 N

58.86 N

15 kg

Explanation:

w = Weight of an object = 100 N

g = Acceleration due to gravity of Earth = $9.81\ \text{m/s}^2$

m = Mass of an object

Weight is given by

$w=mg\\\Rightarrow m=\dfrac{w}{g}\\\Rightarrow m=\dfrac{100}{9.81}\\\Rightarrow m=10.19\ \text{kg}$

Mass of the object is 0.19 kg

g = $2\ \text{m/s}^2$

m = 4 kg

$w=mg\\\Rightarrow w=4\times 2\\\Rightarrow w=8\ \text{N}$

Weight of the object is 8 N.

m = 200 g

$w=mg\\\Rightarrow w=0.2\times 9.81\\\Rightarrow w=1.964\ \text{N}$

Weight of the object is 1.964 N.

Weight is the force the Earth exerts on an object which is on the surface of the Earth.

m = 6kg

$w=mg\\\Rightarrow w=6\times 9.81\\\Rightarrow w=58.86\ \text{N}$

The force of the object is 58.86 N.

w = 150 N

a = g = $10\ \text{m/s}^2$

$m=\dfrac{w}{g}\\\Rightarrow m=\dfrac{150}{10}\\\Rightarrow m=15\ \text{kg}$

Mass of the object is 15 kg.

7 0

3 years ago

4. Define oxidation and reduction in terms of the gain or loss of electrons.

Andreyy89

$\mathbb\color{cyan}{\tiny A\scriptsize N\small S\large W\Large E\huge R}$

Oxidation is loss of electrons, gain of oxygen or loss of hydrogen.
Reduction is gain of electrons, loss of oxygen or gain or hydrogen.

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2 years ago

Suppose that you want to compare the mass of a block of ice to its mass as liquid

Morgarella [4.7K]

Answer:

You will find the mass of the pan and water but if the water got to its boiling temperature that mass may be a little bit off seeing as some of it may have evaporated

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3 years ago

Help with the 3rd question plslsls I’ll brainlist.

Brilliant_brown [7]

1 - energy 2- heat 3 -plant

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2 years ago

Analyze the following chemical combinationsa) MgOb)CaCl2c) Na2O​

Analyze the following chemical combinationsa) MgOb)CaCl2c) Na2O